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Heating

Advice on boilers, radiators, central heating systems and keeping your home warm and energy efficient.

Heating

Your Questions Answered: Chimney Sweeps

As the temperatures drop, those lucky people with wood burning stoves or open fires are looking forward to cosy nights in, snuggled up by the fire. Before you light your fire for the first time this year (if you haven’t already!), make sure that it is safe.

As the temperatures drop, those lucky people with wood burning stoves or open fires are looking forward to cosy nights in, snuggled up by the fire. Before you light your fire for the first time this year (if you haven’t already!), make sure that it is safe.

Throughout the year, leaves and debris may have fallen into your chimney; birds may have nested and that build up of soot from last year’s winter may have solidified, got wet and dried out to form a lovely, flammable lining for your chimney.

If you have a chimney fire and you haven’t taken the right precautions, you may well not be covered on insurance. Here is what you need to know.

When Should You Get Your Chimney Swept?

Chimneys have a very simple job: to let the poisonous by-products of combustion leave your house. By sweeping them regularly you will make sure that your fireplace is safe, and you could improve its efficiency. The more you use your fire, the more often you will need to get your chimney swept, but the general rule is at least once a year. A good clean out before your inaugural autumn fire will help to keep the chimney clear and reduce the risk of fire. If you are in doubt, check with your local chimney sweep.

Can’t Face The Mess?

The idea that having your chimney swept will fill your house with black soot is an outdated myth. The days of chimney sweeping being an incredibly messy job are long past. Many chimney sweeps use a piece of technology similar to a giant vacuum, which simply sucks the dust and soot out with minimal fuss or mess. A good chimney sweep will bring dust sheets, too – just in case.

Gas And Oil Flues

There is no legal requirement to get gas and oil flues swept, but it is advisable. In countries where it is the law, there are fewer instances of carbon monoxide poisoning. Good practice is to sweep all flues at least once a year – your chimney sweep may recommend more regular attention.

Nesting Birds

Nesting birds can cause a huge problem in chimneys and are responsible for a large proportion of chimney fires. These birds happily spend the warmer months making their home in your chimney, only to become smoked out when the temperature drops. Months’ worth of loot (twigs, leaves, feathers) may have been used to create a cosy nest in your chimney; all lovely and dry and just waiting for a spark to ignite it. If you don’t have a cowl or cage on the top of your chimney, ask your chimney sweep; this will prevent birds from nesting and protect your home.

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Looking for more heating advice?

Find clear, practical answers to common heating questions, helping homeowners understand everyday issues, know what checks they can carry out safely, and when it is best to contact a qualified professional.

  • What is the difference between a combi boiler and a system boiler?

    A combi heats water straight from the mains on demand - no cylinder needed, which makes it compact and ideal for smaller homes or flats. A system boiler works with a hot water cylinder, storing a ready supply that can serve multiple taps or showers at once without the pressure dropping - better for larger homes with more bathrooms. There's also the conventional boiler, which needs both a cylinder and a cold water tank in the loft - common in older properties. A heating engineer can help you figure out which suits your home best.

  • Is an air source heat pump right for my home?

    Heat pumps pull warmth from the outside air (even when it's cold) and use it to heat your home and hot water. They work best in well-insulated homes, ideally with underfloor heating or larger radiators that work well at lower temperatures. In draughty or poorly insulated properties, the benefits are more limited. The Boiler Upgrade Scheme currently offers a grant of up to £7,500 towards installation, so it's worth getting a professional assessment to see whether your home is a good fit before committing.

  • How often should a boiler be serviced?

    Once a year, by a Gas Safe registered engineer. It keeps the boiler running safely, catches small issues before they become expensive, and is usually a condition of the manufacturer's warranty. Some home insurance policies require proof of regular servicing too. If you're not sure when yours was last done, book one before winter - better to find out before you're sitting in a cold house!

  • Why is my radiator cold at the top but warm at the bottom?

    This issue is almost always trapped air. Bleeding the radiator - using a radiator key to release the air - usually sorts it, and it's one of the few heating jobs you can safely do yourself. If bleeding it doesn't work, or if several radiators are having the same problem, it might be a pressure or pump issue. Worth getting a heating engineer in to have a look.

  • What are the signs my boiler needs replacing?

    Keep an eye out for: frequent breakdowns, energy bills going up without using more heat, unusual noises (banging, kettling, or whistling), a flame that's yellow or orange instead of blue, and any visible leaks or rust around the unit. If your boiler is over fifteen years old and ticking any of those boxes, replacing it is usually the more economical choice - modern boilers are significantly more efficient.

  • Is underfloor heating worth it and do I need a professional to install it?

    For a new build or a big renovation, underfloor heating is often a great investment - it heats rooms more evenly than radiators and can be more efficient, especially alongside a heat pump. Retrofitting in an existing home is more of a job, and how worthwhile it is depends on your floor types and how much disruption you're happy to deal with. Either way - wet or electric - it has to be installed by a qualified professional.

  • Why does my boiler keep losing pressure?

    Some pressure drop over time is normal, but if you're topping it up regularly there's usually a cause: a small leak in the system (which isn't always easy to spot), a pressure relief valve that's releasing water, or air in the system after bleeding radiators. Topping it up via the filling loop is fine as a short-term fix, but if you're doing it more than a couple of times a year, it's worth getting an engineer to look into why it keeps happening.

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